发明名称 |
Guided wave radar level transmitter |
摘要 |
A guided wave radar measurement instrument comprises a probe defining a guided wave radar transmission line. A pulse circuit is connected to the probe for generating a very fast stream of pulses on the transmission line and receiving reflected pulses returned on the transmission line. The reflected pulses represent a characteristic of a material being measured. An equivalent time sampling circuit is connected to the pulse circuit operable to sample reflected pulses to build a time multiplied picture of the reflected pulses and comprises a ramp generator circuit generating a saw tooth ramp signal used to selectively delay sampling reflected pulses to build the time multiplied picture. In one aspect of the instrument, the saw tooth ramp signal has a controlled ramp start for each cycle and retrace at an end of the cycle. A processing circuit is connected to the equivalent time sampling circuit for selectively controlling ramp start for each cycle and measuring round trip travel time for a pulse from the pulse circuit.
|
申请公布号 |
US6879282(B2) |
申请公布日期 |
2005.04.12 |
申请号 |
US20040794142 |
申请日期 |
2004.03.05 |
申请人 |
MAGNETROL INTERNATIONAL INCORPORATED |
发明人 |
HAYNES KEVIN M. |
分类号 |
G01F23/284;G01S7/282;G01S7/285;G01S7/40;G01S13/02;G01S13/10;G01S13/88;(IPC1-7):G01S13/08 |
主分类号 |
G01F23/284 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|